The Federal Motor Carrier Safety Administration (FMCSA) released research this week on the benefits of using speed limiters (SLs), also known as speed governors, in large trucks. For more information, view the FMCSA's document, titled "Speed-Limiters."SLs are a technology that allows trucking fleets or truck owners to program a preset maximum speed of travel. Many trucking fleets use SLs not only to increase safety by reducing their trucks’ top speed, but also to reduce tire wear, extend the life of the brakes and engine, improve fuel economy, and so on.